function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brou Jr., Vernon & Lafontaine, Donald', 1],
    ['Brou, Vernon Antoine & Lafontaine, J. Donald', 1],
    ['Dubatolov, V. V. & Zinchenko, V. K & Ustjuzhanin, P. Ya.', 1],
    ['Harvey, Leon F.', 2],
    ['Kononenko, Vladimir', 3],
    ['Makhov, I. A. & Lukhtanov, V. A. & Matov, A. Yu.', 1],
    ['Rybalkin, S. A. & Benedek, B. & Dubatolov, V. V.', 4],
    ['Troubridge, J. T.', 3],
    ['W, M.', 3],
    ['Walsh, J.', 1],
    ['Weidlich, Michael', 1],
    ['Wymann, Hans-Peter', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);