function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agnarsson, Ingi', 1],
    ['Chen Zhang', 1],
    ['Chida, Takafumi & Tanikawa, Akio', 1],
    ['Dean, David Allen', 2],
    ['Gao, Cai-Xia & Li, Shu-Qiang', 3],
    ['Levi, H. W., Levi, L. R.', 2],
    ['Lin, Yejie & Wu, Lingbing & Cai, Ducheng & Li, Shuqiang', 1],
    ['Norma-Rashid, Y. & Li, Daiqin', 1],
    ['Simon, Eugène', 1],
    ['Tang, Jiaxin & Liang, Wei & Shi, Haitao & Gao, Caixia', 1],
    ['Tanikawa, Akio', 1],
    ['ZONSTEIN, SERGEI & MARUSIK, YURI M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);