function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Dawah, Hassan A. & Ahmad, Syed K. & Abdullah, Mohammed A.', 4],
    ['El-Hawagry, Magdi S. & Zatwarnicki, Tadeusz & Ebrahim, Ayman M.', 2],
    ['Kahanpaeae, Jere & Zatwarnicki, Tadeusz', 4],
    ['Schlüsslmayr, Gerhard', 1],
    ['Zatwarnicki, Tadeusz & Irwin, Anthony G.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);