function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chami-Kranon, Thanaphum & Likhitrakarn, Natdanai', 1],
    ['Chu, Chang & Li, Shuqiang & Pham, Dinh-Sac & Yao, Zhiyuan', 4],
    ['Dhiya’Ulhaq, Naufal Urfi & Dupérré, Nadine & Buchori, Damayanti', 6],
    ['Jin, Chi & Yin, Xiangchu & Zhang, Feng', 3],
    ['Lin, Yejie & Li, Shuqiang & Pham, Dinh-Sac', 2],
    ['Liu, Keke & Yin, Haiqiang & Haddad, Charles R. & Xu, Xiang', 4],
    ['Yamasaki, Takeshi & Hashimoto, Yoshiaki & Endo, Tomoji', 7],
    ['Zhao, Yi & Peng, Xian-Jin', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);