function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Glowska, Eliza & Chrzanowski, Mateusz & Kaszewska, Katarzyna', 1],
    ['Klimovičová, Miroslava & Mikula, Peter & Kahure, Njoki', 2],
    ['Klimovičová, Miroslava & Skoracki, Maciej & Hromada, Martin', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 6],
    ['Pidhorna, Svitlana Ya. & Chernychko, Kateryna J.', 1],
    ['Skoracki, Maciej', 8],
    ['Skoracki, Maciej & Bochkov, Andre V.', 1],
    ['Skoracki, Maciej & Hromada, Martin & Unsoeld, Markus', 5],
    ['Skoracki, Maciej & Hromada, Martin & Wamiti, Wanyoike', 1],
    ['Skoracki, Maciej & Mironov, Sergey V.', 1],
    ['Skoracki, Maciej & Oconnor, Barry', 1],
    ['Zmudzinski, Mateusz & Skoracki, Maciej & Hromada, Martin', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    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);