function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, V.', 2],
    ['Assing, Volker', 2],
    ['Assing, Volker & Schülke, Michael', 1],
    ['Assing, Volker & Schülke, Michael & Brachat, Volker', 7],
    ['Ghahari, H. & Anlaş, S. & Sakenin, H. & Ostovan, H.', 2],
    ['Huber, Barbara & Gubelmann, Päivi & Büche, Boris', 1],
    ['Mannerheim, C. G.', 1],
    ['Pentinsaari, Mikko & Anderson, Robert & Borowiec, Lech', 1],
    ['Samin, N. & Zhou, H. & Sakenin, H. & Imani, S. & Rastegar, J.', 2],
    ['Schülke, M.', 1],
    ['Webster, Reginald P. & Davies, Anthony E. & Klimaszewski, Jan', 1],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);