function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alberico, Natalia A. & Roccatagliata, Daniel', 3],
    ['Calman, William Thomas', 1],
    ['Corbera, Jordi', 4],
    ['Gamô, Sigeo', 2],
    ['Gerken, Sarah', 171],
    ['Gerken, Sarah & Haye, Pilar A.', 3],
    ['Given, Robert R.', 1],
    ['Kim, Sung-Hyun & Kim, Young-Hyo', 2],
    ['Reyss, Daniel', 1],
    ['Roccatagliata, Daniel & Mühlenhardt-Siegel, Ute', 3],
    ['Sars, Georg Ossian', 1],
    ['Tzareva, Ludmila & Vassilenko, Stella', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=193)',
    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);