function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aung, Ye Lwin & Jin, Xiaohua', 1],
    ['Bandara, Champika & Atthanagoda, Anusha Gayan', 3],
    ['Bosser, Jean', 2],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 2],
    ['Chen, Zhi-Heng & Zhang, Zhong-Yang & Song, Xi-Qiang & Zhang, Zhe', 1],
    ['Gopallawa, Bhathiya & Perera, Amila & Madola, Indrakheela', 1],
    ['Hermans, Johan', 1],
    ['Hu, Ai-Qun & Hsu, Tian-Chuan & Liu, Yan', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 1],
    ['Martos, Florent & Johnson, Steven D. & Bytebier, Benny', 2],
    ['Ormerod, Paul & Kurzweil, Hubert & Watthana, Santi', 1],
    ['Shi, Shi & Yang, Haijun & Wei, Xuefen & Liang, Qianyu', 1],
    ['Suetsugu, Kenji', 2],
    ['Suetsugu, Kenji & Aoki, Rin & Kaneko, Shingo', 2],
    ['Tan, Yun-Hong & Hsu, Tian-Chuan & Pan, Bo & Li, Jian-Wu', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);