function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Liu, Ke-Ke & Yan, Jing & Xiao, Qi-xin & Luo, Chong', 2],
    ['Sankaran, Pradeep M. & Caleb, John T. D.', 4],
    ['Sankaran, Pradeep M. & Sebastian, Pothalil A.', 2],
    ['Wang, Cheng & Peng, Xian-Jin', 3],
    ['Zhou, Bing & Yin, Haiqiang & Xu, Xiang', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);