function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Foster, William J. & Danise, Silvia & Twitchett, Richard J.', 4],
    ['Hryniewicz, Krzysztof & Amano, Kazutaka', 2],
    ['Iredale, Tom', 1],
    ['Kiel, Steffen & Sami, Marco & Taviani, Marco', 2],
    ['Kolpakov, Evgeny V. & Nadtochy, Oleg Yu. Borilko Viktor A.', 1],
    ['Laan, Richard Van Der', 1],
    ['Olive, Graham & Rodrigues, Clara F. & Cunha, Marina R.', 4],
    ['Pacaud, Jean-Michel', 1],
    ['Petit, Richard E.', 1],
    ['Yang, Mei & Li, Baoquan & Gan, Zhibin & Dong, Dong', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);