function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alexiou, Sotiris', 2],
    ['Cao, Cheng-Quan & Chen, Shen-Zhi & Yin, Zhan', 1],
    ['Cao, Cheng-Quan & Shi, Jian-Ping & Hu, Yu-Lin', 1],
    ['Cao, Cheng-Quan & Shi, Jian-Ping & Yin, Zhan', 1],
    ['Cao, Cheng-Quan & Yin, Hai-Xiang & Yin, Zhan', 1],
    ['Cao, Chengquan & Rong, Hua & Naveed, Hassan', 2],
    ['Heads, Sam W. & Hollier, John', 1],
    ['Hollier, John & Heads, Sam W.', 2],
    ['Holuša, Jaroslav & Kočárek, Petr & Vlk, Robert & Marhoul, Pavel', 1],
    ['Kim, Tae-Woo & Puskás, Gellért', 1],
    ['Monnerat C. & Thorens P. & Walter T. & Gonseth Y.', 4],
    ['Skejo, Josip & Rebrina, Fran & Szövényi, Gergely', 2],
    ['Temreshev, Izbasar I. & Makezhanov, Arman M.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['Zhang, Da-Peng & Yin, Hai-Xiang & Yin, Zhan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);