function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bian, Dongju & Zhang, Yue & Ji, Lanzhu', 2],
    ['Miller, Kelly B. & Wewalka, Günther', 11],
    ['Nilsson, Anders N.', 1],
    ['Okada, Ryohei & Jaitrong, Weeyawat & Wewalka, Guenther', 25],
    ['Suprayitno, Nano & Narakusumo, Raden Pramesa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);