function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araya, Juan Francisco', 1],
    ['Arzumanyan, Meri & Zhamakochyan, Gohar & Torosyan, Hasmik', 1],
    ['Brook, Fred J. & Kennedy, Martyn & King, Tania M.', 1],
    ['Frank, Christa', 2],
    ['Kramarenko, S. S. & Kunakh, O. N. & Zhukov, A. V.', 1],
    ['Leonard, William P. & Chichester, Lyle & Baugh, Jim', 2],
    ['Leonard, William P. & Chichester, Lyle & Richart, Casey H.', 4],
    ['Pugh, Philip J. A. & Scott, Bronwen', 2],
    ['Reise, Heike & Schwarzer, Anne-Katrin & Hutchinson, John M. C.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    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);