function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 4],
    ['Akrami, Mohammad Ali & Bayartogtokh, Badamdorj', 1],
    ['Akrami, Mohammad Ali & Shahedi, Alireza', 1],
    ['Aoki, Jun-Ichi & Hirauchi, Yoshiko', 2],
    ['Behan-Pelletier, Valerie M. & Knee, Wayne', 2],
    ['Coetzee, Louise', 1],
    ['Ebrahimi, Forough & A, Mohammad', 3],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 1],
    ['Mahunka, S. & Mahunka-Papp, L.', 2],
    ['Murvanidze, Maka & Mumladze, Levan', 1],
    ['Nakamura, Y. - N. & Fukumori, S. & Fujikawa, T.', 1],
    ['Norton, Roy A. & Ermilov, Sergey G.', 2],
    ['Oliveira, Anibal R. & Argolo, Poliane S. & De, Gilberto J.', 1],
    ['Revelo-Tobar, Harol', 1],
    ['Ryabinin, Nikolay A. & Liu, Dong & Gao, Meixiang & Wu, Dong-Hui', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);