function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gorochov, A. V.', 20],
    ['Li, Shan & Zhang, Qianwen & Bian, Xun', 2],
    ['Liu, Jing & Luo, Haiyu & Lu, Xiangyi & Bian, Xun', 10],
    ['Liu, Jing & Yang, Zizhong & Lu, Xiangyi & Bian, Xun', 5],
    ['Nagar, Rajendra & Swaminathan, Rajamani & Meena, Ashok Kumar', 3],
    ['Rentz, D. C. F.', 1],
    ['Shi, Fu-Ming & Qiu, Ming', 6],
    ['Shi, Fu-Ming & Xie, Guang-Lin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    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);