function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Canbulat, Savaş', 1],
    ['Ghahari, H. & Hayat, R. & Tabari, M. & Ostovan, H. & Imani, S.', 1],
    ['Hassan, Muhammad Asghar & Liu, Xingyue', 4],
    ['Hassan, Muhammad Asghar & Oswald, John D. & Zia, Ahmed', 3],
    ['Henry, Charles S. & Brooks, Stephen J. & Duelli, Peter', 2],
    ['Henry, Charles S. & Brooks, Stephen J. & Johnson, James B.', 6],
    ['Henry, Charles S. & Taylor, Katherine L. & Johnson, James B.', 1],
    ['Makarkin, V. N. & Markova, T. O. & Maslov, M. V.', 1],
    ['Makarkin, V. N. & Solodovnikov, A. Yu. & Shchurov, V. I.', 1],
    ['Tillier, Pierre', 2],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);