diff --git a/examples/healthcare/application/Cardiovascular_Disease/train.py b/examples/healthcare/application/Cardiovascular_Disease/train.py
index 4d3d07557..2caa68998 100644
--- a/examples/healthcare/application/Cardiovascular_Disease/train.py
+++ b/examples/healthcare/application/Cardiovascular_Disease/train.py
@@ -1,3 +1,21 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 from singa import singa_wrap as singa
 from singa import device
 from singa import tensor
diff --git a/examples/healthcare/application/Diabetic_Disease/Diabetic_Retinopathy_Classification/train.py b/examples/healthcare/application/Diabetic_Disease/Diabetic_Retinopathy_Classification/train.py
index bab78c23f..e3f3649f2 100644
--- a/examples/healthcare/application/Diabetic_Disease/Diabetic_Retinopathy_Classification/train.py
+++ b/examples/healthcare/application/Diabetic_Disease/Diabetic_Retinopathy_Classification/train.py
@@ -1,3 +1,21 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 from singa import singa_wrap as singa
 from singa import device
 from singa import tensor
diff --git a/examples/healthcare/data/kidney.py b/examples/healthcare/data/kidney.py
index 5956aae4a..6ed0d7dc2 100644
--- a/examples/healthcare/data/kidney.py
+++ b/examples/healthcare/data/kidney.py
@@ -1,3 +1,21 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 import numpy  as np
 
 import pickle