function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chu, Chang & Lu, Ying & Li, Shuqiang & Yao, Zhiyuan', 6],
    ['Lu, Ying & Chu, Chang & Yao, Zhiyuan & Li, Shuqiang', 3],
    ['Omelko, Mikhail M. & Fomichev, Alexander A.', 3],
    ['Sankaran, Pradeep M. & Joseph, Mathew M.', 1],
    ['Wang, Lu-Yu & Irfan, Muhammad & Zhang, Feng & Zhang, Zhi-Sheng', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);