function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Caleb, John T. D.', 1],
    ['Cao, Qi & Li, Shuqiang & Żabka, Marek', 1],
    ['Gan, Jiahui & Mi, Xiaoqi & Wang, Cheng', 1],
    ['Kanesharatnam, Nilani & Benjamin, Suresh P.', 4],
    ['Peng, Xianjin & Li, Shuqiang', 1],
    ['Wang, Cheng & Li, Shuqiang', 1],
    ['Wang, Wei-Hang & Wang, Cheng', 3],
    ['Yang, Weicheng & Zhou, Yufeng & Gu, Dongxue & Yu, Hao', 1],
    ['Zhang, J. X. & Song, D. X. & Li, Daiqin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);