function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, Volker', 3],
    ['Assing, Volker & Brachat, Volker & Meybohm, Heinrich', 5],
    ['Assing, Volker & Schülke, Michael & Brachat, Volker', 3],
    ['Franz, Herbert', 1],
    ['Jałoszyński, Paweł', 29],
    ['Jałoszyński, Paweł & Perkovsky, Evgeny', 1],
    ['Orousset, Jean', 2],
    ['Pentinsaari, Mikko & Anderson, Robert & Borowiec, Lech', 2],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);