function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['Fallén, Carl Fredrik', 2],
    ['Levesque-Beaudin, Valerie & Mlynarek, Julia J.', 1],
    ['Swann, John', 1],
    ['Xi, Yu-Qiang & Yang, Ding & Yin, Xin-Ming', 3],
    ['Xi, Yuqiang & Yang, Ding', 8],
    ['Xi, Yuqiang & Yin, Xinming', 4],
    ['Xi, Yuqiang & Zhu, Yongqiang & Liu, Chang & Yang, Ding', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);