function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chu, Chang & Lu, Ying & Li, Shuqiang & Yao, Zhiyuan', 3],
    ['Deeleman-Reinhold, Christa', 2],
    ['Lin, Yejie & Zhao, Huifeng & Koh, Joseph K H & Li, Shuqiang', 3],
    ['Marusik, Yuri M. & Zheng, Guo & Li, Shuqiang', 4],
    ['Mu, Yannan & Zhang, Feng', 3],
    ['Sankaran, Pradeep M. & Malamel, Jobi J. & Joseph, Mathew M.', 2],
    ['Zapata, Lorena V. & Ramírez, Martín J.', 1],
    ['Zhao & Peng', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);