function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alipanah, Helen & Slamka, František', 2],
    ['Bernard Landry', 2],
    ['Bland, Keith P.', 2],
    ['Garre, Manuel J. & Girdley, John & Guerrero, Juan J.', 1],
    ['Gumhalter, Danijela & Kučinić, Mladen & Šašić, Martina', 1],
    ['Ko, Jae-Ho & Bayarsaikhan, Ulziijargal & Lee, Tak-Gi', 1],
    ['Mbata, Keith J. & Prins, Jurate De', 2],
    ['Poltavsky, Alexander N. & Kravchenko, Vasiliy D.', 2],
    ['Rao, B. S. K. & Sivaperuman, C.', 1],
    ['Singh, Navneet & Ranjan, Rahul & Talukdar, Avishek', 27],
    ['Sullivan, J. Bolling & Solis, M. Alma', 1],
    ['Weidlich, Michael', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 2],
    ['Yepishin, Viktor & Khalaim, Yevhenii & Budashkin, Yuriy', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);