function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Zhi-Teng', 4],
    ['Judson, Sarah W. & Nelson, C. Riley', 2],
    ['Tang, Zixiang & Wang, Jie & Li, Weihai & Bozdoğan, Hakan', 1],
    ['Teslenko, Valentina A. & Palatov, Dmitry M.', 6],
    ['Teslenko, Valentina A. & Zwick, Peter & Bazova, Natalya V.', 1],
    ['Zwick, Peter & Baumann, Richard W.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);